Portion of a cutting head



FIG. 1 is a front perspective view of the portion of the cutting head;

FIG. 2 is a top view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is bottom view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a front view thereof; and,

FIG. 7 is a rear view thereof.

The portion shown in dashed lines is shown for illustrative purposes only and forms no part of the claimed design. 

CLAIM The ornamental design for the portion of the cutting head, as shown and described. 